This document shows how to migrate an ESX host from the VMware ESX release 3.5 to VMware ESX 4.0, but it is valid for any ESX 3.x, It is designed for small environments, of one or two host's, but it would not make sense since it is a manual update process, without the ability to schedule the task or perform more than one simultaneous migration or by specifying a migration order for our hosts.
We continue in the process of migrating the VMware Virtual Infrastructure environment 3 to VMware vSphere 4. We first upgraded the VMware VirtualCenter server to VMware vCenter Server, later we will have migrated the VMware Update Manager component to VMware vCenter Update Manager 4.0. After this, we will now be able to upgrade from ESX to the 4.0. All this, of course, taking into account whether our ESX hosts are fully compatible with the new version, to do this, check it in the VMware HCL.
VMware SiteSurvey and CPU Identification Utility are two VMware utilities that will show us the compatibility of our hardware to check if we can support VMware vSphere or ESX on our hosts 4.0 with all its features, since in order to use Fault Tolerance (For example) we must meet some CPU requirements.
If we are facing an installation of many ESX servers and we have to make a new installation on the servers we have, We can or do it by hand one by one, inserting the CD and completing the wizard or, use a virtual appliance that will allow us to deploy new ESX servers per network, all of them already configured with the options that interest us. This will save us a lot of time, is a virtual appliance called EDA or ESX deployment Appliance available on the VMware Virtual Appliance Web.
Yes, as the title says, a VMware ESX can be virtualized 4.0 inside another VMware VM, and also, be able to create and boot virtual machines within our virtual VMware ESX!!! Logically we are talking about a test environment and never for production, as it is ideal for setting up your own lab if you don't have enough VMware ESX-compatible hardware 4.0 and want to try out the new features (Fault Tolerance or FT, vNetwork Distributed Switch or DVS, Host Profiles Linked VC… Let's go vSphere) or if you want to perform a testing lab… it is also done in a few very simple and quick steps.
Simple document on how to perform a basic installation of a VMware ESX host or server 4.0, It will be a simple installation with no setup during installation more than the basic one. We should keep in mind that before installing VMware ESX on any physical server, we must always enable the virtualization technology of our processor, either Intel VT or AMD-V at the server BIOS level.
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